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Stafford Horne 4951def1e2 openrisc: Fix cache API compile issue when not inlining 
[ Upstream commit 3ae90d7640 ]

I found this when compiling a kbuild random config with GCC 11.  The
config enables CONFIG_DEBUG_SECTION_MISMATCH, which sets CFLAGS
-fno-inline-functions-called-once. This causes the call to cache_loop in
cache.c to not be inlined causing the below compile error.

    In file included from arch/openrisc/mm/cache.c:13:
    arch/openrisc/mm/cache.c: In function 'cache_loop':
    ./arch/openrisc/include/asm/spr.h:16:27: warning: 'asm' operand 0 probably does not match constraints
       16 | #define mtspr(_spr, _val) __asm__ __volatile__ (  \
	  |                           ^~~~~~~
    arch/openrisc/mm/cache.c:25:3: note: in expansion of macro 'mtspr'
       25 |   mtspr(reg, line);
	  |   ^~~~~
    ./arch/openrisc/include/asm/spr.h:16:27: error: impossible constraint in 'asm'
       16 | #define mtspr(_spr, _val) __asm__ __volatile__ (  \
	  |                           ^~~~~~~
    arch/openrisc/mm/cache.c:25:3: note: in expansion of macro 'mtspr'
       25 |   mtspr(reg, line);
	  |   ^~~~~
    make[1]: *** [scripts/Makefile.build:283: arch/openrisc/mm/cache.o] Error 1

The asm constraint "K" requires a immediate constant argument to mtspr,
however because of no inlining a register argument is passed causing a
failure.  Fix this by using __always_inline.

Link: https://lore.kernel.org/lkml/202008200453.ohnhqkjQ%25lkp@intel.com/
Signed-off-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2020-09-23 12:40:36 +02:00
..
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
cache.c openrisc: Fix cache API compile issue when not inlining 2020-09-23 12:40:36 +02:00
fault.c Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2019-07-08 21:48:15 -07:00
init.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ioremap.c openrisc: map as uncached in ioremap 2019-08-31 11:57:53 +09:00
tlb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00